To determine which symbol makes the inequality 2x ? 20 true for all solutions x = 10, x = 11, and x = 12, we can plug these values into the inequality. Since the inequality is true for all solutions, the correct symbol is ≥. So, the answer is: d) ≥.

Answer 1

2(10) = 20, which is equal to 20, making the inequality true for x = 10.
2(11) = 22, which is greater than 20, making the inequality true for x = 11.
2(12) = 24, which is greater than 20, making the inequality true for x = 12.